Protobuf for Traffic Annotation and first use by a URLFetcher.

net/traffic_annotation/network_traffic_annotation_test_helper.h

Index: net/traffic_annotation/network_traffic_annotation_test_helper.h
diff --git a/net/traffic_annotation/network_traffic_annotation_test_helper.h b/net/traffic_annotation/network_traffic_annotation_test_helper.h
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index 0000000000000000000000000000000000000000..9c58d7aa68226dba2789cc255b2e06ffb740e5e2
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+++ b/net/traffic_annotation/network_traffic_annotation_test_helper.h
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+// Copyright 2017 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef NET_TRAFFIC_ANNOTATION_NETWORK_TRAFFIC_ANNOTATION_TEST_HELPER_H_
+#define NET_TRAFFIC_ANNOTATION_NETWORK_TRAFFIC_ANNOTATION_TEST_HELPER_H_
+
+#include "net/traffic_annotation/network_traffic_annotation.h"
+
+// Macro for unit tests traffic annotations.
+#define TRAFFIC_ANNOTATION_FOR_TESTS   \
+  net::DefineNetworkTrafficAnnotation( \
+      "UnitTest", "Traffic annotation for unit, browser and other tests")
+
+#endif  // NET_TRAFFIC_ANNOTATION_NETWORK_TRAFFIC_ANNOTATION_TEST_HELPER_H_